Today’s MacUpdate promo features Mail Factory 2.5  for US$23.95 (40% off, retail $39.95). Mail Factory is a program for designing and printing envelopes, postcards, address and shipping labels on your Mac. It integrates with virtually all databases including Mac OS X Address Book, MS Entourage, Now Contact and FileMaker Pro. The application has embedded databases for editing and storing addresses. Mail Factory requires Mac OS X 10.2 or later.